I have a son 19 months me and his dad recently split for a few months and he’s just moved home but this was the same before the break up. Ds doesn’t want me doing anything for him when dp is around, he’ll follow him everywhere he goes in the house and throws a tantrum when he leaves the room. When he needs comforting ds goes to dp as his preference and just generally seems to not want me around. Dp is the soft touch for example if ds wants more chocolate he makes him come and ask me rather than telling him no himself or if I tell him no to something and he throws a tantrum I’ll ignore him (while safe) whereas dp will go and comfort him during this tantrum making me seem the worst in the world. I’ve seen on these threads before children go through phases of preference but it’s never swung back to me since ds was maybe 11/12 months and it’s just getting hard always being the bad cop